https://www.rossispa.it/wp-content/themes/rossi/js/requesttimeout.js

1(function($) {
2        window.requestAnimFrame = (function() {
3        return  window.requestAnimationFrame       ||
4                        window.webkitRequestAnimationFrame ||
5                        window.mozRequestAnimationFrame ||
6                        window.oRequestAnimationFrame     ||
7                        window.msRequestAnimationFrame   ||
8                        function( callback, element){
9                                window.setTimeout(callback, 1000 / 60);
10                        };
11    })();
12})();
13
14window.requestTimeout = function(fn, delay) {
15        if( !window.requestAnimationFrame               &&
16                !window.webkitRequestAnimationFrame &&
17                !(window.mozRequestAnimationFrame && wiindow.mozCancelRequestAnimationFrame) && // Firefox 5 ships without cancel support
18                !window.oRequestAnimationFrame    &&
19                !window.msRequestAnimationFrame)
20                        return window.setTimeout(fn, delay);
21
22        var start = new Date().getTime(),
23                handle = new Object();
24
25        function loop(){
26                var current = new Date().getTime(),
27                        delta = current - start;
28
29                delta >= delay ? fn.call() : handle.value = requestAnimFrame(loop);
30        };
31
32        handle.value = requestAnimFrame(loop);
33        return handle;
34};
35
36window.clearRequestTimeout = function(handle) {
37        if ( typeof handle !== 'undefined' ) {
38                window.cancelAnimationFrame ? window.cancelAnimationFrame(handle.value) :
39                window.webkitCancelAnimationFrame ? window.webktCancelAnimationFrame(handle.value) :
40                window.webkitCancelRequestAnimationFrame ? window.webkitCancelRequestAnimationFrame(handle.value) : /* Support for legacy API */
41                window.mozCancelRequestAnimationFrame ? window.mozCancelRequestAnimationFrame(handle.value) :
42                window.oCancelRequestAnimationFrame     ? window.oCancelRequestAnimationFrame(handle.value) :
43                window.msCancelRequestAnimationFrame ? window.msCancelRequestAnimationFrame(handle.value) :
44                clearTimeout(handle);
45        }
46};
47
48
49window.requestInterval = function (fn, delay) {
50  var requestAnimFrame = (function () {
51    return window.requestAnimationFrame || function (callback, element) {
52      window.setTimeout(callback, 1000 / 60);
53    };
54  })(),
55  start = new Date().getTime(),
56  handle = {};
57  function loop() {
58    handle.value = requestAnimFrame(loop);
59    var current = new Date().getTime(),
60    delta = current - start;
61    if (delta >= delay) {
62      fn.call();
63      start = new Date().getTime();
64    }
65  }
66  handle.value = requestAnimFrame(loop);
67  return handle;
68};